The top ten, who control a combined $20 billion, is made up of all white men. Eight out of the ten are over sixty; the other two are in their 40s.

That's fairly consistent with the average profile of billionaires across the world. According to Wealth-X and UBS's "Billionaire Census" report out last year, the typical billionaire is 63 years old and didn't reach the $1 billion threshold until their late forties.